AQ-L310 Line differential protection IED

AQ-L310 is a line protection IED with line differential protection for transmission, sub-transmission and distribution line protection applications. It integrates a full range of line protection functions along with variety of additional functions for control, measurement, monitoring and communications.

 

Highlights

  • Line differential up to 120km with fiber optic communication
  • Redundant fiber communication option
  • Monomode and multimode fiber support
  • Other communication media available alternatively (e.g. pilot wire)


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  • Line Differential (87L)
  • Three-phase overcurrent, 3 stages INST, DT or IDMT (50/51)
  • Residual overcurrent, 3 stages INST, DT or IDMT (50/51N)
  • Directional three-phase overcurrent, 2 stages INST, DT or IDMT
  • Teleprotection, PUTT, POTT, Direct, DUTT (86)
  • Directional residual overcurrent, 2 stages INST, DT or IDMT (67N)
  • Current unbalance, 1 stage (46)
  • Overvoltage, 2 stages INST, DT (59)
  • Undervoltage, 2 stages INST, DT (27)
  • Residual voltage, 2 stages INST, DT (59N)
  • Negative sequence over voltage protection (47)
  • Under/over frequency, 4 stages DT (81U/O)
  • Rate of change of frequency, 1 stage DT (81R)
  • Line thermal protection (49)
  • Breaker failure protection (50BF,52BF)
  • Inrush detection and blocking (68)
  • Auto-reclose, 4 shots (79)
  • Synchrocheck (25)
  • Voltage transformer supervision function (60)
  • CT supervision
  • Switch onto fault (SOTF)
  • Current (I1, I2, I3, Io)
  • Voltage (U1, U2, U3, U12, U23, U31, Uo) and frequency
  • Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-)
  • Trip circuit supervision (TCS)
  • Circuit breaker wear protection
  • Event recording
  • Disturbance recorder
  • Non-volatile event records: 10000
  • Control functions
  • Bay control unit, 6 objects
  • Status monitoring switching devices, 2 objects
  • Single and three phase trip
  • Current inputs: 4
  • Voltage inputs: 4
  • Digital inputs: 12
  • Digital outputs: 8 + 2 high speed trip contacts
  • Non-volatile disturbance records: 100
  • Non-volatile event records: 10000
  • RJ 45 Ethernet 100Mb (front standard)
  • RJ 45 Ethernet 100Mb (rear standard)
  • RS422/RS485/RS232 interfaces (option)
  • Plastic or glass fiber interfaces (option)
  • Communication protocols
  • IEC 61850
  • IEC 608705101,103,104
  • Modbus RTU and Modbus TCP/IP
  • DNP 3.0 and DNP 3.0 over TCP/IP
  • SPAbus